"It's got to be really funny and that first one was so darn funny. I think we'll try again," Murray says. "You've just got to have a really good script...Even the second 'Ghostbusters' wasn't as funny for me as the first one. It's hard to make a sequel."

There have been numerous fits and starts for the project. But the concept gained steam recently after
Dan Aykroyd spoke more of his interest in the movie. During a February webchat on Empire Online, Aykroyd
says, "The script must be perfect. We cannot release a film that is any less than that."

The first two "Ghostbusters" movies went on to make more than $500 million worldwide. The film also spawned a cartoon series, video games and comic books.